Safety door for switchboards



Aug. 26, 1930.

H. GROSS Filed Nov. 22, 1927 r. W- E 2 22 2- L 21 2a 37 29 a1 37 INVENTOR.

p A TTORNEX Patented Aug.26,1930 j: 1,774,265

UNITED STATES PATENT OFFICE HUGO GROSS, OF MARTINSVILLE, NEW JERSEY SAFETY DOOR FOR SWITCHBOARDS Application filed November 22, 1927. Serial No. 234,953.

This invention relates to electric switches handle 13 and the switch lever mounted withor fuse panels in general, and particularly in the panel, (not shown), and the moveto their closure. ment of the handle 13 controls the position of One of the objects of this invention is to the switch lever. Thus, when the lever is 6 provide a door for the panel which may not pulled to its extreme out position, the 5. be operated when the switch of the panel switch lever disengages the switch mounting is in its circuit closing position, and which and thereby breaks the current. lVhen the door may be opened only when the switch is handle 13 is pushed into the inward most in its circuit breaking position, thereby preposition, bar 19 causes the switch lever to eluding any danger connected with handling make contact and thereby closes the circuit. 60

fuses or switches within the panel while cur- On the inner side of the permanent closure rent is passing through. 10 and opposite bracket 11, there is provided Another object of my invention is to proa housing 21, in which is mounted a swinging vide such safety door with a locking mechdetent 22, adapted to register with and enanism, the operation of which depends upon gage notch of bar 19. At the lower por- 6 the operation of a switch handle operating tion of the detent are provided teeth A the switch in the panel. pawl 24, normally placed against teeth 23 of The foregoing and further objects will be the detent 22, by spring 25, is adapted to hold more fully apparent from the following dedetent 22 in its engaging position, as shown 20 scription and the accompanying drawings, in Figure 3.

forming part of this disclosure, and in which Hingedly connected at 26 with the perma- Figure 1 representsaback view of the panel nent closure, is a door or operative closure closure, 27, which is adapted to swing in the disc from Figure 2 is a cross sectional view, taken on the panel mounting. Associated with this line 2-2 of Figure 1, closure is a locking arrangement consisting Figure 3 is a. similar back view of the panel of a sliding bar 28, guided in its travel by closure, showing the .door opening mechatwo slots 29 and 30, engaging pins or bolts nism in its unlocking position, and 31. The upper end of bar 28 is providr-zd Figure 4 is a cross sectional View, taken on with a toothed extension 32, which is adapted. line 44 of Figure 3. to engage the teeth 23, of detent 22.

Referring to the drawings, numeral 10 A transverse slot 33 is provided in bar 28 denotes the permanent closure portion of the and is engaged by pin 34, eccentrically mountpanel which is fastened to the wall or over ed on a disc 35, operable by wing knob 36.

a panel mounted on a stand. Actually only The operative closure 27 is prevented from the front portion of the permanent panel swinging inwards by means of washers 37., closure is shown, as it is obvious that its form shown plainly in Figures 2 and3.

may be changed in accordance with the form of the panel mounting.

F ixedly attached to the permanent closure WVhen door 27 is in its closed position, and part is a bracket 11, which supports at 12 a when handle 13 is in its inward position, switch lever 13. This lever is provided at shown in Figure 2, bar 28 cannot be moved 14 and 15 with abutments adapted to engage downwards, by turning knob 36, for the reacorresponding abutments 16 and 17 proson that teeth 23, of the detent, engage the vided on bracket 11, which abutments limit teeth of extension 32, and the detent is prethe swinging movement of handle 13. At vented from turning since its edge 38 engages 18, a bar 19 is hingedly attached to the hanthe full face of the bar 19. dle 13, and is provided with a notch 20, hen handle 13 is swung into outward the purpose of which will be explained presposition, as shown in Figure 4, so that its ently. abutments 15 and 17 contact, bar 19 is brought Bar 19 serves as connecting rod between into a position where notch 20 permits-the Operation swinging movement of detent 22. it is then possible to turn noh 16 and therch inove slide 98 in downward d rection, so that its 1e edge "formed hc-twc-cn )erative closuir s, as clearly seen in Figi 3 flow the do r, or operative may he readil swung outwards.

ll hen it dean-i: knob 36, operated with its toothed end of p: wl i B) out of eng'i and i detent 22 it clears hair into the inward po. and renders the lo inoperative.

While I huve devicm he it unt n-ove nents n l parting "from the i vi'iich or fuse panel. a pcrrianei t closure. an ope"- ative closure hinged v associated therewith, a pivoted switcl hxnc le mounted on said permanent closu s for liniitingr its swii hinged to said handle and r id permanent closure into the interior the panel and aunpted to engage a switch lever thereon and capable reciprocating motion imparted there 1. In coinhinati o of a i r to by said handle, a detent mechanism arr-a reed belt v: said bar and ched ianent closure, and consisting of i V l dctent adapted to swing into and out oi the path of said har an opening: and closing dev ice mounted on snid operative closure and having means for operti mid detent. the latter havinga houss-nd operating means of said opening; and g'device adapteth when enga; a;ed h v said no means said detent. to assume ay 3 het'v; said housing; and the inner ace of said permanent closure thus preventlr in n-ovided \alill a notch adopted to receive and permit the ,peration Olf said detent. when the bar in its outward osition, that is T) when the handle is pulled to its extreme out position, thus pern'iitting the opening of said operative closure, said har p enting the operation of the detent when from o r 2. The coinhii ation with a closure for electric devices, composed of a tationarv casing and a door hingedl connected therewith, of an operating lever pivotally mounted With- )elllli eventing said open tive closure f I". 4, 2c. U

out, and associated with said casing, an operating bar hingedly connected with said lever and attending into said a ing and provided h a notch at its lower face operation limiting ineans provided with said lever and governi: the travel of said bar, and therefore its notch, a detent mechanism attached at the inner face of said casing and comprisinq a detent operative in a plane transverse the path of operation of said bar, and adapted to either engage said notch, or the solid side face of said bar, depending upon the position of the latter relative to said letent detent locking means forming a part t chanism, and comprising a .pring awl ad; ital to engage and keep I said a detent o icratingr device n ocimprising a sliding d door. sliding har snid bar and c1 tive from withsaid d t it and for engaging e hitter so as to brin it in a har. said sliding har forming.

cn a ine' said detcnt, a closure tor sand r; i g har provided with f t pawl 'lroni enietei 11 read}: to engage the solid :-:ide taco .jid ic-vei at: New Yorl: in the county of New id State of h ew York this 15th day o't Yoveniher, A. I). 1927.

HUGO GROSS. 

